ICD-10-CM Codes
O00-O9A Pregnancy, childbirth and the puerperium
O30-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems
O43- Placental disorders
2021 ICD-10-CM Diagnosis Code O43.91

2021 ICD-10-CM Diagnosis Code O43.91

Unspecified placental disorder, first trimester

2016

2017

2018

2019

2020

2021

Billable/Specific Code

Maternity Dx (12-55 years)

1st Trimester (< 14 weeks)

O43.91 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2021 edition of ICD-10-CM O43.91 became effective on October 1, 2020.
This is the American ICD-10-CM version of O43.91 - other international versions of ICD-10 O43.91 may differ.

ICD-10-CM Coding Rules

O43.91 is applicable to maternity patients aged 12 - 55 years inclusive.
O43.91 is applicable to mothers in the first trimester of pregnancy, which is defined as less than 14 weeks since the first day of the last menstrual period.

The following code(s) above O43.91 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to O43.91:

O00-O9A
2021 ICD-10-CM Range O00-O9A
Pregnancy, childbirth and the puerperium
Note
- CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
- Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
- Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
- 1st trimester- less than 14 weeks 0 days
- 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
- 3rd trimester- 28 weeks 0 days until delivery
Type 1 Excludes
- supervision of normal pregnancy (Z34.-)
Type 2 Excludes
- mental and behavioral disorders associated with the puerperium (F53.-)
- obstetrical tetanus (A34)
- postpartum necrosis of pituitary gland (E23.0)
- puerperal osteomalacia (M83.0)
Use Additional
- code from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Pregnancy, childbirth and the puerperium
O43
ICD-10-CM Diagnosis Code O43
Placental disorders
Type 2 Excludes
- maternal care for poor fetal growth due to placental insufficiency (O36.5-)
- placenta previa (O44.-)
- placental polyp (O90.89)
- placentitis (O41.14-)
- premature separation of placenta [abruptio placentae] (O45.-)
Placental disorders

ICD-10-CM O43.91 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):

817 Other antepartum diagnoses with o.r. Procedures with mcc
818 Other antepartum diagnoses with o.r. Procedures with cc
819 Other antepartum diagnoses with o.r. Procedures without cc/mcc
831 Other antepartum diagnoses without o.r. Procedures with mcc
832 Other antepartum diagnoses without o.r. Procedures with cc
833 Other antepartum diagnoses without o.r. Procedures without cc/mcc

Convert O43.91 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

ICD-10-CM Codes Adjacent To O43.91

O43.812 …… second trimester

O43.813 …… third trimester

O43.819 …… unspecified trimester

O43.89 Other placental disorders

O43.891 …… first trimester

O43.892 …… second trimester

O43.893 …… third trimester

O43.899 …… unspecified trimester

O43.9 Unspecified placental disorder

O43.90 …… unspecified trimester

O43.91 …… first trimester

O43.92 …… second trimester

O43.93 …… third trimester

O44 Placenta previa

O44.0 Complete placenta previa NOS or without hemorrhage

O44.00 …… unspecified trimester

O44.01 …… first trimester

O44.02 …… second trimester

O44.03 …… third trimester

O44.1 Complete placenta previa with hemorrhage

O44.10 …… unspecified trimester

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2021 ICD-10-CM Diagnosis Code O43.91

Unspecified placental disorder, first trimester

Pregnancy, childbirth and the puerperium

Placental disorders